Electrical ignition device



' May 12, 1925.

J. BERG ELECTRICAL IGNITIYON DEVICE 1923 2 Sheets-Sheet l Filed April 2lMay 12, 1925.

J. BERG ELECTRICAL IGNITION DEVICE 2 Sheets-Sheet 2 Filed April 2l, 1923e i, 4%@ 'j H ticular arrangement shown', as it ma Patented May l2,1925.

UNITED STATES lroma Bane, or CHICAGO, ILLINOIS, AssrGNon'To METALsPEoIaLTIEs MANUFAo'rUn-- PATENT OFFICE.

` ING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRICAL IGNITION DEVICE.

application inea apra 21, 192s. serial ne. 633,800.

To all whom it may concern:

Be it known that I, JOHN BERG, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented anew and useful Improvement in Electrical Ignition Devices, of which thefollowing isa specification.

My invention relates, morer particularly, to electrical ignition devicesof the type generally used in electric cigar-lighters; and my object,generally stated, is to provide improvements in devices of thischaracter to the end that they will Jfunction in a highly desirablemanner, be simple and of relatively inexpensive construction, andmaintained in suiiiciently cool condition to permit of the readyhandling of the Ysame without danger of burning the operator.

I have illustrated my improvement, as embodied in a device forming oneof the elements of an electrical cigar-lighter involving the' use of anelectric reel and containing features for which I am making separateapplication for patent. However, I do not wish to be understood asintending to limit my invention to its incorporation in the pag'- e usedin various other arrangements wit out departing from the spirit of theinvention.

Referring to the accompanying drawings:

Figure 1 is a view in side elevation of the electric cigar-lighterreferred to, certain parts thereof bein shown broken awayand in section,the device being shown as secured in an aperture of the instrumentboardof an automobile. Figure 2 is a broken, enlarged, sectional view ofcertain of the parts shown in Fig. l 1, the electrical ignition devicethereof, and to improvements in which my present invention relates,being shown in disassembled, yet related, position to the jack] whichcarries it, the section being takenat the line 2 on Fig. 3 and viewed inthe direction of the arrow. Figure 3 is a plan view of the jack of Fig.2, with the case or shell thereof shown in section. Figure 4 is alongitudinal sectional view of my improved device, the section beingtaken at the line 4 on Fig. 6 and viewed in the direction of the arrow.Figure 5 is a longitudinal sectional view of the body portion of thedevice of Fig. 4, with the other parts removed, the section being takenat the line 5 on Fig. 6 and viewed in the direction of the arrow. Figure7 is a longitudinal sectional view of the the side walls of the housingand forming a part of the structure referred to.

Figure 12 is a face view of the electrical heating element employed; andFigure 13, a face view of a perforated mica dlsk also forming a part ofthe structure of Fig. 4.

Referring more particularly to Figs. 1, 2 and 3, the structure thereinshown comprises a supporting tube 14 whichis externally threaded, asrepresented, and 4is adapted to be mounted in an opening in aninstrumentboard, as, for example, the opening 15 in the board 16illustrated and which may be the instrument board of an automobile, thetube 14 being held in place on the board through the medium of nuts 17and 18 screwed upon this tube and against the back and frontv faces,respectively, of the board. The tube 14, which ,is open at its oppositeends, con-I nec-ts Vwith the cross-piece 19 of a yokeshaped clip 20, atthe aperture 21 therein, these parts being held together by clamping thecross-.piece 19 between deflected annular portions 22 and 23 of the tube14. Supported in the clip 20 is a housing 24, straddled by the side armsof the clip, to which the housing is secured as by a screw 25 bridgingthe arms of this bracket, these arms prefu erably containinginwardly-struck' bosses 25l which extend into recesses' (not shown) inrevent turning of the housing on the brac et, the housing 24 containinga shaft 26 journaled in the opposite wallsthereof and forming a part ofan electric reel mechanism shown as of the same general construction asthe reel disclosed in United States Patent No. 1,260,626 granted to meMarch 26, 1918, the wires Wound on the reel and located within thehousing 24 being represented at 27 and a spring, for automaticallyre-winding the wire on the reel when drawn therefrom, at 28. the wires27 extending through an opening 29 in the peri heral wall of the housing24. The device a so comprises a j ack represented generally at 30 andformed of a casing 31, preferably of heat-non-conducting material, theend wall of which contains an opening 32 through vwhich the wires 27ex'- tend. The opposite endof the casing 31 contain-s an electric socketstructure 33 comprising an internally-threaded metallic shell 34 and acenter contact 34 insulated there.- froni by the insulating disk 36. Thethreaded shell 34 is electrically connected with acontact strip 37through which the center contact 35 extends and from which it isinsulated by the disk 36 and a disk 38 surrounding the center contact,the strip 37 supporting a flexible contact strip 39 secured to the strip37 by a rivet 40 passing through these elements andinsulated therefromby the tubular, flanged, insulating member 414 and the insulating disk42, a strip 43 of cur- Contactin engagement with which portion v thestrip 39 extends except when it is pushed away therefrom against itsinherent springiness,as through the medium of the button 44 secured tothe strip 39 and movable in an opening 46 in the side wall of the casing31.

The jack .30 is adapted to be inserted into the tube 14 as shown in Fig.2, in which position the Vparts are in normal, inoperating, condition,the button 45 being of such size, as shown, that when the jack isintroduced into the tube A14 'the engagement of the button with theinner surface of the tube 14 causes the contact 39 to be out ofengagement with t-lie centercontact 35 and thus the circuit through thejack is broken. A

The jack constructed as described yis adapted to have screwed into itssocket portion 33 an ignition device 47 embodying my improvements,thisignition device ,being formed of a main, body, member 48 which, 1naccordance with one feature of my inventlon, is formed of anysuitableheat-nonconducting material. One face of the member 48 isprovided with the stepped recesses 49 and 50 and the other thereof withstepped recesses 51 and 52, all of these recesses being concentricallydisposed relative to the axis ,ofthe member 48, and the recesses 5() and51 being separated from each other by an annular web portion 531formingan integral part of the member 48, this web surround-` ing acentrally-disposed sleeve portion 54 extending at opposite sides of theweb. The end of the member 48 containing the recesses 49. and 50, isrecessed at intervals, as repre-y sented at 55, these recesses,extending through the bottom stepped wall of the recess 49 and into theside wall of. this recess. The recesses 5.5 communicate with slots 56 inthe web portion 53 shown as beyond the recess 52, this web portion alsocontaining an opening 57 passage 58 extending therethrough in which ametallic member 59, forming the center contact of the igniting device,1s confined. The member 59` contains, in one end thereof,

a socket 60 surrounded by an annular flange 61, and at its opposite endan internallythreaded socket 62 intoy which a contactscre-w 63,overlapping the adjacent end of the member 54, is screwed. The othercontact member of the ignition device, and which is in the form of ascrew plug, is represented at 64, this member, which is adapted to screwinto the shell 34 of the jack, surrounding one end of the sleeve 54 andextending at an annular flange portion 65 thereof into the recess 52,the {iange portion 65 containing an aperture 66 registering with theaperture 57 in the web 53.

The coil of electric resistance wire which forms the heating element ofthe device, is represented at 67, the terminals 68 and 69 of this coilbeing electrically connected with the contact plug 64 and the centercontact 59 as hereinafter described. The heating element 67 atwiseopposes a perforated disk 70 of mica, backed by a similarly perforateddisk 71 of asbestos, these disks surrounding the member 59 at itsflanged end, with the-flange 61 overlapping the mica disk 70 at the wallof theaperture through the latter. A metal washer 72 extends flatwiseagainst the disk 70, and liatwise opposing this washer at the oppositeface thereof is la mica star, represented at 73, which is backed by aniet-al star 74 of the same shape andsize as the mica star 73 with itsradiating portions in alinement theiiewith.. The members 70, 71, 72, 73,74 and 67 are secured together, to form a unitary structure, by a ring76 having rearwardly-extending lugs 77, this ring fitting atwise againstthe outer surface ofthe member 74, with its lugs 77 extending across theedges of the ,various members just referred to and bent to over- .lapthe 'rearface of the disk 71, the struc- "ture so provided beingseatedwithin the re,-

cess 49 and 'against the mutilated bottom wall 7 8 of this recess, whichlatter contains recesses 79 into which the extremities of the lugs 77extend.

The connections between the terminals of the heating element 67 and thecontacts of the igniting device are made as follows: l vThe terminal 68extends through registering apertures in the disks 7() and 71v and vintothe openings 57 and 66 and is held tightl)7 in place in the opening 66by a pin 78 driven into .these o nings and against the terminals 68. heother terminal 69 ofthe ignition element extends into the socket 60 ofthe member 59 and is held tightly in engagement therewith by a pin 79driven into this socket and against :the terminal 69.

It will be noted from the foregoing that the ignition device is openfrom' end to end.

for the circulation of air therethrough, to maintain the parts of thedevice, ,atv which it is handled bythe operator, in cool condition, notonly through the openings in the members 70, 71, 72, 73 and 74, therecess 50 and slots 56, but also through the recesses (which extendlaterally beyond the ring 7 6), recess 50 and slots 56; this feature,particularly inv connection with that of providing cigar-lighter as thecooling effect produced does not impair the device for erforming thepurpose for which it is provi ed.-

While I have illustrated and described a particular constructionembodying my invention, I do not Wish to be understood as lntending tolimit itthereto as the same vmay be variously modified and alteredWithout departin from the spirit of the invention.

YVhat claim as new, and desire to secure by Letters Patent, is:

1. In .a device of the character set forth, an insulation body havingits front side provided With a chamber, and aresistance elementassembly, mounted -in said chamber, comprising a spiral of resistanceYwire, insulation disks at opposite sides of the plane of said spiral,an intervening ring between said disks, and a retainer equip d withmeans clampingly securing said intervening ring together. v,

2. In a device of the character set forth, an insulation body providedat its front side with a chamber and at its rear side with ai metallicsocket member, and a resistance element alssembly mounted in saidchamber, comprising a pair of insulation disks, an intervening ring, aspiral of resistance wire disposed in the space within. said ring, and aretainery equipped with means securing said disks andl intervening ringvtogether, said spiral having an eccentric terminal extending throughsaid insulation body and having a central terminal extending throughsaid insulation body and through the socket member thereof.

3. An ignition device comprising an insulation body provided at itsfront and rear sides with chambers and provided at its rear side with ametallic socket member, a resistance element mounted in the frontchamber and having one end ecoentrically connected with said socketmember', airpassages connecting the front and rear chamisks and bers,and a central terminal comprising a metallic member extending throughsaid insulation body and the socket-member and attached to the other endofsaid resistance element and a screw connected with and serving tosecure said central metallic member in position, ysaid screw affording acontact surface.

4. In an electric igniter, an insulation body equipped with a tubularmetallic shank at its rear side affording a terminal and equi ped alsoWith a resistance element at its ront side, said body having aperturestherethrough outside said shank and open-` ing at front and rea-1' sidesof said body.

5. In an electric igniter, an insulation body equipped w1th a tubularmetallic shank at its rear side affording a terminal and equipped alsowith a resistance element at its front side, said body having aperturestherethrough outside of said shank and .opening at front and rear sidesof said body and said body having a central portion -extending throughsaid metallic shank, and a central terminal extending through thecentral portion of said body and connected with said resistance element.

6. -A resistance element assembly comprising a pair` of aperturedinsulation disks, an intervening resistance spiral, a ring clamplnglysecuring said parts together, and a central terminal comprisingametallic member having its front end anchored to one extremity of saidspiral and having the other end provided with a threaded bore, and ascrew .in said bore having a head adapted to serve as a contact.

7. A resistance element assembly comprising a pair of aperturedinsulation disks, an intervening resistance spiral, a ring clampinglysecuring said parts together, and a central terminal comprising ametallic member having its ront end anchored to oneextremity of saidspiral and having the other end provided with a threaded bore, and ascrew in said bore having a head adapted to serve as a contact, incombinationv with an insulation body having its front face recessed toaccommodate said resistance element and having a 'tubular shank portionthrough which said central terminal eX- tends, said screw` having itshead 4portion provided with a ilange which bears against the rear end ofthe shank portion of the insulation body.

8. An ignition device comprising a bodymember containing a recess in aface thereof and a passage opening into said recess and opening throughthe op osite face of said member. and an electrica resistance elementlocated in said recess in spaced relation to the end wall of the latter,said member containing a second passage opening into said recess andopening through .the face of said member in which said recessisvlocated.

llO

9. Ali ignitiondevice comprising a bodymember containinga recess 1n a:tace thereof,

and a unitary structure comprising an elecf.-

trical resistance element and open-Work membersof insulating materialflatwise opposing said element and held together in assembled positionlocated in said recess, said member containing a passage opening intosaid recess and through the opposite face of said member.

10. An :ignition device comprising a bodymember containing a recess in aface thereof,

i and a unitary structure comprising an elecelement on said body member,an electrical.

contact in said sleeve portion and contacting With one of the terminalsyof said element, and a Secondelectrical Contact on said sleevecontacting with the other terminal of said element.

12. A. i-gar-lighting device. comprising a .body-member` presenting asleeve-portion at its, central portion, an electrical resistanceelein'ent on4 said body-member, an electrical center contact in saidsleeve portion and contacting with one of the terminals of said element,and a second screW-plug contact surrounding said sleeve-portion andcontacting with the other terminal of Said element.

maas?? which the other terminal of said element extends and is secured'.Y

14. An ignition device comprising a body# member containing a steppedrecess in a face thereof and presenting a sleeve-portion at its centralportion, an electrical resistance element in said recess in spacedrelation to the end-wall thereof whereby said member presents a chamberbetween said element and the end wall of said recess, said membercontaining passages opening into'said chamber and opening through theopposite faces, respectively, of said lmember to provide air passages, acenter contact member in said sleeve portion engaging one of theterminals of said element and a second electrical contact surroundingsaid sleeve-portion and in vengagement with the other terminal of saidelement.

15. An element Otan" electrical ignition device, comprising anelectrical resistance element, insulating members ilatwise opposing saidelement, and a ring with lugs extending therefrom and having inwardlyvextending portions, said elements and membersbeing confined between saidring and the inwardly-extending portions of said lugs.

JOHN BERG.

